diff options
| author | Sigrid Solveig Haflínudóttir <sigrid@ftrv.se> | 2022-09-01 20:51:06 +0000 |
|---|---|---|
| committer | Sigrid Solveig Haflínudóttir <sigrid@ftrv.se> | 2022-09-01 20:51:06 +0000 |
| commit | a194f52c9377e010c31612d6484cbd43df6d5e24 (patch) | |
| tree | 6e2ff71f1c3835e491decc3b09f022c3caef0c4d /sys/src/9/imx8/lcd.c | |
| parent | a609c6102f28f53a9a151804998d4e4b5347ddb5 (diff) | |
imx8/lcd: toggle lcdif on blankscreen
Stop DOTCLK on interrupt after the current frame is done,
toggle PWM2.
Diffstat (limited to 'sys/src/9/imx8/lcd.c')
| -rw-r--r-- | sys/src/9/imx8/lcd.c | 35 |
1 files changed, 34 insertions, 1 deletions
diff --git a/sys/src/9/imx8/lcd.c b/sys/src/9/imx8/lcd.c index 1bedbbc4a..89726a2da 100644 --- a/sys/src/9/imx8/lcd.c +++ b/sys/src/9/imx8/lcd.c @@ -356,6 +356,11 @@ static u32int *dphy = (u32int*)(VIRTIO + 0xA00300); static u32int *lcdif = (u32int*)(VIRTIO + 0x320000); +static struct { + Lock; + int blank; +}lcdifirq; + /* shift and mask */ static u32int sm(u32int v, u32int m) @@ -464,7 +469,8 @@ lcdifinit(struct video_mode *mode) /* enable underflow recovery to fix image shift */ wr(lcdif, LCDIF_CTRL1, sm(7, CTRL1_BYTE_PACKING_FORMAT) | - CTRL1_RECOVER_ON_UNDERFLOW); + CTRL1_RECOVER_ON_UNDERFLOW | + CTRL1_CUR_FRAME_DONE_IRQ_EN); wr(lcdif, LCDIF_CTRL, CTRL_BYPASS_COUNT | @@ -828,10 +834,35 @@ backlighton(void) gpioout(GPIO_PIN(1, 10), 1); } +static void +lcdifinterrupt(Ureg *, void *) +{ + wr(lcdif, LCDIF_CTRL1_CLR, CTRL1_CUR_FRAME_DONE_IRQ); + ilock(&lcdifirq); + if(lcdifirq.blank){ + /* turn off dotclk */ + wr(lcdif, LCDIF_CTRL_CLR, CTRL_DOTCLK_MODE); + /* wait for the fifo to empty */ + while(rr(lcdif, LCDIF_CTRL) & CTRL_RUN) + ; + lcdifirq.blank = 0; + } + iunlock(&lcdifirq); +} + void blankscreen(int blank) { + ilock(&lcdifirq); + lcdifirq.blank = blank; + if(blank == 0) /* restart lcdif */ + wr(lcdif, LCDIF_CTRL_SET, CTRL_DOTCLK_MODE | CTRL_RUN); + iunlock(&lcdifirq); + + /* toggle panel backlight */ gpioout(GPIO_PIN(1, 10), blank == 0); + /* toggle PWM2 */ + mr(pwm2, PWMCR, (blank == 0)*CR_EN, CR_EN); } static void @@ -891,6 +922,8 @@ lcdinit(void) lcdifreset(); + intrenable(IRQlcdif, lcdifinterrupt, nil, BUSUNKNOWN, "lcdif"); + setclkrate("mipi.core", "system_pll1_div3", 266*Mhz); setclkrate("mipi.CLKREF", "system_pll2_clk", 25*Mhz); setclkrate("mipi.RxClkEsc", "system_pll1_clk", 80*Mhz); |